用verilog实现一个简单自动售货机的功能
时间: 2024-03-06 15:51:34 浏览: 16
好的,我可以为您提供一个简单的自动售货机的Verilog代码实现。代码如下:
```
module vending_machine(
input clk,
input rst,
input coin,
input btn,
output reg [3:0] state,
output reg vend
);
parameter IDLE = 4'b0000;
parameter COIN_INSERTED = 4'b0001;
parameter BUTTON_PRESSED = 4'b0010;
parameter DISPENSING = 4'b0011;
parameter VEND_COMPLETE = 4'b0100;
reg [3:0] next_state;
always @ (posedge clk) begin
if (rst) begin
state <= IDLE;
end else begin
state <= next_state;
end
end
always @ (*) begin
next_state = state;
vend = 0;
case (state)
IDLE: begin
if (coin) begin
next_state = COIN_INSERTED;
end
end
COIN_INSERTED: begin
if (btn) begin
next_state = BUTTON_PRESSED;
end
end
BUTTON_PRESSED: begin
next_state = DISPENSING;
end
DISPENSING: begin
vend = 1;
next_state = VEND_COMPLETE;
end
VEND_COMPLETE: begin
next_state = IDLE;
end
endcase
end
endmodule
```
这个自动售货机模块有五个状态:`IDLE`,`COIN_INSERTED`,`BUTTON_PRESSED`,`DISPENSING`,和 `VEND_COMPLETE`。当硬币插入时,自动售货机进入 `COIN_INSERTED` 状态。当按下按钮时,自动售货机进入 `BUTTON_PRESSED` 状态。在 `DISPENSING` 状态下,自动售货机会出售物品并进入 `VEND_COMPLETE` 状态。在 `VEND_COMPLETE` 状态下,自动售货机会回到 `IDLE` 状态。
您可以根据您的需求修改该代码实现自己想要的功能。